WO2023160232A1 - 电池单体、电池以及用电设备 - Google Patents

电池单体、电池以及用电设备 Download PDF

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Publication number
WO2023160232A1
WO2023160232A1 PCT/CN2022/143219 CN2022143219W WO2023160232A1 WO 2023160232 A1 WO2023160232 A1 WO 2023160232A1 CN 2022143219 W CN2022143219 W CN 2022143219W WO 2023160232 A1 WO2023160232 A1 WO 2023160232A1
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WIPO (PCT)
Prior art keywords
pole
tab
battery cell
main body
electrode sheet
Prior art date
Application number
PCT/CN2022/143219
Other languages
English (en)
French (fr)
Other versions
WO2023160232A9 (zh
Inventor
林蹬华
陈新祥
黄守君
陈龙
郑于炼
王鹏
金海族
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to JP2024509036A priority Critical patent/JP2024531292A/ja
Priority to KR1020247005345A priority patent/KR20240034823A/ko
Priority to EP22928471.6A priority patent/EP4391200A1/en
Publication of WO2023160232A1 publication Critical patent/WO2023160232A1/zh
Publication of WO2023160232A9 publication Critical patent/WO2023160232A9/zh
Priority to US18/589,579 priority patent/US20240204312A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of batteries, in particular to a battery cell, a battery and an electric device.
  • the cell may be subject to extrusion force inside the battery, and the ability of the cell to resist extrusion will affect the service life of the battery.
  • the present application provides a battery cell, a battery and an electrical device, which can improve the extrusion resistance of the battery cell.
  • the present application provides a battery cell, which includes a casing, a first battery cell and a second battery cell, the first battery cell is arranged inside the casing, the first battery cell includes a first main body part and a second battery cell A first electrode lead-out part extending from the first side of the main body, the second electric core is arranged inside the casing, the second electric core includes the second main body and the first electrode extending from the second side of the second main body Two electrode lead-out parts; wherein, the first electric core and the second electric core are arranged along the first direction, and the first side of the first main body part and the second side of the second main body part are adjacent and oppositely arranged, and the first electrode leads out
  • the component includes a first connection surface inclined relative to the first direction, the second electrode lead-out component includes a second connection surface inclined relative to the first direction, and the first connection surface is electrically connected to the second connection surface.
  • connection By setting the first connection surface inclined relative to the first direction and the second connection surface inclined relative to the first direction, and making the first electrode lead-out part and the third electrode lead-out part electrically connected to the second connection surface through the first connection surface
  • the connection can decompose a part of the extrusion force that makes the first cell and the second cell close to each other in a direction perpendicular to the first direction, so as to relieve the extrusion impact on the first electrode lead-out part and the third electrode lead-out part , thereby improving the service life of the first battery cell and the second battery cell.
  • the lengths of the first electrode lead-out part and the third electrode lead-out part along the first direction can also be shortened, thereby saving the first electrode lead-out part and the occupied space of the third electrode lead-out parts, so as to achieve the purpose of reducing the volume of the battery cell.
  • the first connection surface is a plane and is perpendicular to the first direction; and/or, the second connection surface is a plane and is perpendicular to the first direction.
  • Setting the first connection surface and the second connection surface as a plane perpendicular to the first direction can bear the extrusion force through the first connection surface and the second connection surface, and relieve the tension of the first electrode lead-out part and the third electrode to a large extent.
  • the impact of the lead-out parts can improve the service life of the first battery cell and the second battery cell; it can also save the occupied space of the first electrode lead-out parts and the third electrode lead-out parts to a large extent, and reduce the volume of the battery cell. Increase the energy density of battery cells.
  • the battery cell further includes an adapter piece connected between the first connection surface and the second connection surface.
  • an adapter piece connected between the first connection surface and the second connection surface.
  • the adapter piece includes a compressible portion.
  • the compressible part has deformation ability, and the extrusion force is relieved through the deformation of the compressible part.
  • the compressible part may comprise an elastic part or a part with grooves.
  • the elastic part can adopt a spring or a rubber pad or the like.
  • the adapter sheet includes a first support portion and a second support portion connected to each other, the first support portion is supported on the first connection surface, the second support portion is supported on the second connection surface, the first support portion and the second support portion Grooves are provided between the second supporting parts.
  • the adapter piece has compressibility.
  • the first support part or the second support part is subjected to a pressing force, due to the existence of the groove, the first support part or the second support part can move closer to each other.
  • the direction is inclined, so as to absorb part of the extrusion force, reduce the impact on the first electrode lead-out part and the third electrode lead-out part, and effectively protect the first battery cell and the second battery cell.
  • the first support portion includes a first support surface that fits on the first connection surface
  • the second support portion includes a second support surface that fits on the second connection surface.
  • the first electrode lead-out part further includes a first connecting portion extending along the first direction
  • the second electrode lead-out part further includes a second connecting portion extending along the first direction
  • the adapter plate includes a The third supporting part connected with the first connecting part and the fourth supporting part connected with the second supporting part
  • the third supporting part is used to support the first connecting part
  • the fourth supporting part is used to support the second connecting part.
  • the first electrode extraction part includes a first positive tab and a first negative tab
  • the second electrode extraction part includes a second positive tab and a second negative tab
  • the first positive tab is electrically connected to the second positive tab
  • the first negative tab is electrically connected to the second negative tab.
  • the length direction of the first cell is parallel to the first direction
  • the length direction of the second cell is parallel to the first direction.
  • the first cell includes a third tab drawn from the third side of the first body part opposite to the first side
  • the second cell includes a third tab drawn from the second side of the second body part opposite to the second side.
  • the fourth tab led out from the fourth side, and the polarity of the third tab and the fourth tab are opposite.
  • the first cell and the second cell respectively include three tabs.
  • the battery cell further includes a first pole and a second pole, the first pole is electrically connected to the third pole, and the second pole is electrically connected to the fourth pole.
  • the battery cell includes two poles, and the two poles are respectively connected with the third tab extending from the second side of the first body part and the fourth tab extending from the fourth side of the second body part. Tab electrical connection.
  • the battery cell further includes a first cover plate and a second cover plate
  • the casing is provided with a first opening and a second opening oppositely disposed along the first direction
  • the first cover plate and the second cover plate are respectively Closed to the first opening and the second opening
  • the first pole is set on the first cover plate
  • the second pole is set on the second cover plate.
  • the first opening and the second opening are arranged opposite to each other along the first direction, therefore, the first cover plate closed to the first opening is close to the third tab, and the first pole is arranged on the first cover plate Therefore, it can effectively shorten the distance between the third tab and the first pole, facilitate the connection between the third tab and the first pole, and also help shorten the length of the third tab, thereby reducing the third pole
  • the ear takes up less space and the volume of the battery cell is reduced.
  • the second cover plate closed to the second opening is close to the fourth pole, and the second pole is arranged on the second cover, so the distance between the fourth pole and the second pole can be effectively shortened, Facilitating the connection between the fourth tab and the second pole is also conducive to shortening the length of the fourth tab, thereby reducing the occupied space of the fourth tab and reducing the volume of the battery cell.
  • the first main body part includes a first positive electrode sheet, a first negative electrode sheet and a first separator, the first positive electrode sheet and the first negative electrode sheet are wound or stacked to form the first main body part, and the first separator is arranged on the first positive electrode sheet and the first negative electrode sheet.
  • the first end of the first positive electrode sheet extends from the third side of the first main body to form a third tab, and the first end of the first negative electrode is flush with the third side of the first main body;
  • the first end of the first negative electrode sheet extends from the third side of the first main body to form a third tab, and the first end of the first positive electrode is flush with the third side of the first main body; and/or ,
  • the second main body part includes a second positive electrode sheet, a second negative electrode sheet and a second diaphragm, the second positive electrode sheet and the second negative electrode sheet are wound or laminated to form the second main body part, and the second diaphragm is arranged on the second positive electrode sheet and the second diaphragm.
  • the first end of the second positive electrode sheet extends from the fourth side of the second main body to form a fourth tab, and the first end of the second negative electrode is flush with the fourth side of the second main body;
  • the first end of the second negative electrode sheet extends from the fourth side of the second main body to form a fourth tab, and the first end of the second positive electrode is flush with the fourth side of the second main body.
  • the pole piece opposite to the polarity of the third pole tab By arranging the pole piece opposite to the polarity of the third pole tab to be flush with the third side, the pole piece can not protrude, thereby shortening the length of the pole piece, which not only saves the material of the pole piece, It is also possible to reduce the related operations of insulating the pole piece, and omit the insulating part used to insulate the pole piece from other live parts.
  • the pole piece opposite to the polarity of the fourth pole tab By arranging the pole piece opposite to the polarity of the fourth pole tab to be flush with the fourth side, the pole piece can not protrude, thereby shortening the length of the pole piece, so that not only the material of the pole piece can be saved, It is also possible to reduce the related operations of insulating the pole piece, and omit the insulating part used to insulate the pole piece from other live parts.
  • the first cell includes a third positive tab and a third negative tab drawn from the third side of the first main body opposite to the first side
  • the second cell includes a third tab from the second main body.
  • the fourth positive tab and the fourth negative tab lead out from the fourth side opposite to the second side.
  • the first cell and the second cell respectively include four tabs.
  • the battery cell further includes a first pole, a second pole, a third pole and a fourth pole, the first pole is electrically connected to the third positive tab, and the third pole is connected to the third pole.
  • the negative pole ear is electrically connected
  • the second pole is electrically connected to the fourth positive pole
  • the fourth pole is electrically connected to the fourth negative pole.
  • the battery cell includes four poles, and the four poles are respectively connected with two tabs extending from the second side of the first main body and two tabs extending from the fourth side of the second main body. Tab electrical connection.
  • the battery cell further includes a first cover plate and a second cover plate
  • the casing is provided with a first opening and a second opening oppositely disposed along the first direction
  • the first cover plate and the second cover plate are respectively Closed to the first opening and the second opening
  • the first pole and the third pole are both arranged on the first cover plate
  • the second pole and the fourth pole are both arranged on the second cover plate.
  • the first opening and the second opening are arranged opposite to each other along the first direction. Therefore, the first cover plate closed to the first opening is close to the third positive tab and the third negative tab, and the first pole and the third
  • the third poles are all arranged on the first cover plate, so the distance between the first pole and the third positive pole and the distance between the third pole and the third negative pole can be effectively shortened, so that the first pole and the third pole can be conveniently connected.
  • the connection between the three positive tabs and the third pole and the third negative tab is also conducive to shortening the length of the third positive tab and the third negative tab, thereby reducing the occupied space of the third positive tab and the third negative tab, reducing The volume of the battery cell.
  • the second cover plate closed to the second opening is close to the fourth positive tab and the fourth negative tab, and the second pole and the fourth pole are arranged on the second cover plate, so the second pole can be effectively shortened.
  • the distance between the fourth positive pole and the fourth pole and the fourth negative pole is convenient for the connection between the second pole and the fourth positive pole and the fourth pole and the fourth negative pole, and also helps to shorten the distance between the fourth pole and the fourth pole.
  • the lengths of the four positive tabs and the fourth negative tab further reduce the space occupied by the fourth positive tab and the fourth negative tab, reducing the volume of the battery cell.
  • the present application provides a battery, including the battery cell in the above embodiment.
  • the present application provides an electric device, comprising the battery unit and/or the battery in the above embodiment, for supplying electric energy to the electric device.
  • Fig. 1 is a schematic structural diagram of some embodiments of electrical equipment disclosed in the present application.
  • Fig. 2 is a schematic structural view of some embodiments of the battery disclosed in the present application.
  • Fig. 3 is an exploded view of some embodiments of battery cells disclosed in the present application.
  • Fig. 4 is a schematic structural view of some embodiments of battery cells disclosed in the present application.
  • Fig. 5 is a front view of some embodiments of battery cells disclosed in the present application.
  • Fig. 6 is a top view of some embodiments of battery cells disclosed in the present application.
  • Fig. 7 is an enlarged view of the part indicated by label A in Fig. 6;
  • Fig. 8 is a top view of other embodiments of battery cells disclosed in the present application.
  • Fig. 9 is an enlarged view of the part indicated by label B in Fig. 8;
  • Fig. 10 is a schematic structural view of the first cell in some embodiments of the battery cell disclosed in the present application.
  • Fig. 11 is a schematic structural view of the second cell in some embodiments of the battery cell disclosed in the present application.
  • Fig. 12 is an exploded view of other embodiments of battery cells disclosed in the present application.
  • Fig. 13 is a schematic structural view of other embodiments of battery cells disclosed in the present application.
  • Fig. 14 is a front view of other embodiments of battery cells disclosed in the present application.
  • the second cell 31.
  • the second main body 3a.
  • the second electrode lead-out part 3b.
  • the fourth electrode lead-out part 32.
  • the second positive ear 321.
  • the second connection part 33, the second negative tab; 34, the fourth tab; 35, the fourth positive tab; 36, the fourth negative tab;
  • Adapter piece 101. First supporting part; 101A. First supporting surface; 102. Second supporting part; 102A. Second supporting surface; 103. Third supporting part; 104. Fourth supporting part; 105. groove;
  • the term “plurality” refers to two or more, unless otherwise specifically defined. Similarly, “multiple groups” refers to more than two groups, and “multiple pieces” refers to more than two pieces, unless otherwise specifically defined.
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • multiple batteries of conventional length can be installed in one battery cell, which can avoid the pole piece wrinkling problem that is easy to occur during the manufacturing process of long batteries, and can increase the number of batteries To achieve the purpose of increasing battery capacity.
  • arranging multiple batteries in the same housing can effectively save some assembly processes and save some electrical connection components, etc., so a considerable cost savings can be achieved.
  • the inventors of the present application considered that when a plurality of battery cells are arranged in the same casing, there will be a connection problem between two battery cells.
  • the extension direction of the electrical connection between the two cells is parallel to the arrangement direction of the two cells, so there is a risk that the electrical connections will be inserted into each other when the cells are squeezed.
  • the inventor of the present application proposes that the electrical connection part of the two electric cores can be arranged to be inclined relative to the arrangement direction of the two electric cores, so that in the direction perpendicular to the arrangement direction Part of the extrusion force is decomposed, thereby alleviating the extrusion impact, effectively protecting the electrical connection, thereby protecting the two batteries, and improving the service life of the two batteries.
  • the inventors of the present application have improved the structure of the battery cell, effectively improving the extrusion resistance of the battery cell.
  • An embodiment of the present application provides a battery including a battery cell.
  • Batteries can be used, but not limited to, in electrical equipment such as vehicles, ships, or aircraft.
  • the power supply system of the electrical equipment can be composed of the battery cells and batteries disclosed in this application.
  • An embodiment of the present application provides an electric device using a battery as a power source, and the battery is configured to provide electric energy to the electric device.
  • Electrical equipment can be, but not limited to, mobile phones, portable devices, laptops, battery cars, electric vehicles, ships, spacecraft, electric toys and electric tools, etc.
  • spacecraft include airplanes, rockets, space shuttles, spaceships, etc.
  • Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.
  • Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railways Power tools such as drills, grinders, wrenches, screwdrivers, hammers, impact drills, concrete vibrators, and planers.
  • a vehicle 1000 is used as an example for illustration in some embodiments of the present application.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 .
  • the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300.
  • the battery 100 is used to provide electric energy for the operation of the motor 300 and other components in the vehicle.
  • the controller 200 is used to control the operation of the motor 300, for example, for the starting, navigation and Working electricity demand while driving.
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is an exploded view of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10a and battery cells 20a, and the battery cells 20a are accommodated in the case 10a.
  • the box body 10a is used to provide accommodating space for the battery cells 20a, and the box body 10a can adopt various structures.
  • the box body 10a may include a first cover body 101a and a second cover body 102a, the first cover body 101a and the second cover body 102a cover each other, the first cover body 101a and the second cover body 102a An accommodating space for accommodating the battery cells 20a is defined.
  • the second cover 102a can be a hollow structure with an open end, the first cover 101a can be a plate-shaped structure, and the first cover 101a is covered on the opening side of the second cover 102a, so that the first cover 101a and the first cover 101a
  • the two covers 102a jointly define an accommodation space; the first cover 101a and the second cover 102a can also both be hollow structures with one side opening, and the opening side of the first cover 101a is covered by the opening of the second cover 102a side.
  • the box body 10a formed by the first cover body 101a and the second cover body 102a may be in various shapes, such as a cylinder, a cuboid, and the like.
  • the battery 100 there may be multiple battery cells 20a, and the multiple battery cells 20a may be connected in series, in parallel or in parallel.
  • the mixed connection means that the multiple battery cells 20a are both in series and in parallel.
  • a plurality of battery cells 20a can be directly connected in series, in parallel or mixed together, and then the whole composed of a plurality of battery cells 20a is accommodated in the box 10a; of course, the battery 100 can also be a plurality of battery cells 20a
  • the battery modules are first formed in series, parallel or mixed connection, and then multiple battery modules are connected in series, parallel or mixed to form a whole, and accommodated in the box 10a.
  • the battery 100 may also include other structures, for example, the battery 100 may also include a current flow component for realizing electrical connection between a plurality of battery cells 20a.
  • the battery cell 20a refers to the smallest unit constituting the battery.
  • the battery cell 20a includes a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, which is not limited in the embodiments of the present disclosure.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which are not limited in the embodiments of the present disclosure.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in the embodiments of the present disclosure.
  • FIGS. 3 to 7 are respectively an exploded view, a three-dimensional structural diagram, a front view and a top view of a battery cell 20a provided by some embodiments of the present application.
  • the battery cell 20 a includes a casing 1 , a first cell 2 and a second cell 3 , and both the first cell 2 and the second cell 3 are disposed inside the casing 1 .
  • the casing 1 is a component used to provide an accommodating space for accommodating the first cell 2 and the second cell 3 , electrolyte and other components therein.
  • the housing 1 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 1 can be determined according to the specific shapes and sizes of the first battery cell 2 and the second battery cell 3 .
  • the material of the housing 1 can be selected from metallic materials such as copper, iron, aluminum, stainless steel, aluminum alloy or non-metallic materials such as plastic.
  • the first electric core 2 is disposed inside the housing 1 , and the first electric core 2 includes a first main body portion 21 and a first electrode lead-out part extending from the first side S1 of the first main body portion 21 2a.
  • the second cell 3 is disposed inside the housing 1 , and the second cell 3 includes a second main body 31 and a second electrode lead-out part 3 a extending from the second side S2 of the second main body 31 .
  • the first cell 2 and the second cell 3 are arranged along the first direction x, and the first side S1 of the first body part 21 and the second side S2 of the second body part 31 are adjacent and opposite to each other.
  • the direction indicated by the indicator line with double arrows is the first direction x.
  • the first battery cell 2 and the second battery cell 3 are arranged along the first direction x, the center line of the first battery cell 2 and the center line of the second battery cell 3 are collinear and parallel to the first direction x.
  • the first side S1 of the first cell 2 and the second side S2 of the second cell 3 are adjacent to and opposite to each other, so that the first electrode lead-out part 2a on the first side S1 and the second electrode lead-out part 2a on the second side S2
  • the electrode lead-out parts 3a are close to each other, and the electrical connection between the first cell 2 and the second cell 3 is realized through the electrical connection between the first electrode lead-out part 2a and the second electrode lead-out part 3a.
  • the third side S3 of the first cell 2 opposite to the first side S1 and the fourth side S4 of the second cell 3 opposite to the second side S2 are far away from each other, and the third side S3 extends out of the third electrode lead-out part 2b, the fourth side S4 extends the fourth electrode lead-out part 3b, the third electrode lead-out part 2b and the fourth electrode lead-out part 3b can be respectively used as two electrodes of the battery cell, so that the first battery cell 2 and the second battery cell
  • the connection of the core 3 and the two electrode connection parts of the battery cell are all arranged in the first direction x, which is conducive to optimizing the internal structure arrangement of the battery cell, thereby helping to reduce the volume of the battery cell.
  • the first electrode lead-out part 2a includes a first connection surface 221 inclined relative to the first direction x
  • the second electrode lead-out part 3a includes a second connection surface 321 inclined relative to the first direction x.
  • the connection surface 221 is electrically connected to the second connection surface 321 .
  • inclined means to be arranged at an angle to the first direction x.
  • connection surface 221 inclined relative to the first direction x and the second connection surface 321 inclined relative to the first direction x By setting the first connection surface 221 inclined relative to the first direction x and the second connection surface 321 inclined relative to the first direction x, and making the first electrode lead-out part 2a and the second electrode lead-out part 3a pass through the first connection surface 221 is electrically connected to the second connection surface 321, which can decompose a part of the pressing force that makes the first battery cell 2 and the second battery cell 3 approach each other in the direction perpendicular to the first direction x, thereby relieving the first electrode lead-out part 2a and the extrusion shock received by the second electrode lead-out part 3 a, thereby improving the service life of the first battery cell 2 and the second battery cell 3 .
  • the lengths of the first electrode lead-out part 2a and the second electrode lead-out part 3a along the first direction x can also be shortened, thereby The occupied space of the first electrode lead-out part 2a and the second electrode lead-out part 3a is saved, and the purpose of reducing the volume of the battery cell is achieved.
  • the first connection surface 221 is a plane and is perpendicular to the first direction x; and/or, the second connection surface 321 is a plane and is perpendicular to the first direction x. Setting the first connection surface 221 and the second connection surface 321 as a plane perpendicular to the first direction x can bear the extrusion force through the first connection surface 221 and the second connection surface 321, and greatly ease the lead-out of the first electrode.
  • Part 2a and the second electrode lead-out part 3a are subjected to the impact, improve the service life of the first electric core 2 and the second electric core 3; can also save the first electrode lead-out part 2a and the second electrode lead-out part 3a to a large extent Occupy space, reduce the volume of the battery cell, and increase the energy density of the battery cell.
  • the battery cell further includes an adapter sheet 10 connected between the first connection surface 221 and the second connection surface 321 .
  • an adapter sheet 10 connected between the first connection surface 221 and the second connection surface 321 .
  • the adapter piece 10 includes a compressible portion.
  • the compressible part has deformation ability, and the extrusion force is relieved through the deformation of the compressible part.
  • the compressible part may comprise an elastic part or a part with grooves.
  • the elastic part can adopt a spring or a rubber pad or the like.
  • the adapter sheet 10 includes a first support part 101 and a second support part 102 connected to each other, the first support part 101 is supported on the first connection surface 221, and the second support part 102 is supported on the second connection surface 321 , a groove 105 is provided between the first support part 101 and the second support part 102 .
  • the adapter piece 10 has compressibility.
  • the first supporting part 101 or the second supporting part 102 When the first supporting part 101 or the second supporting part 102 is subjected to a pressing force, due to the existence of the groove 105, the first supporting part 101 or the second supporting part The parts 102 can be inclined toward each other, so as to absorb part of the extrusion force, reduce the impact on the first electrode lead-out part 2 a and the second electrode lead-out part 3 a, and effectively protect the first battery cell 2 and the second battery cell 3 .
  • the first supporting part 101 includes a first supporting surface 101A that fits on the first connecting surface 221
  • the second supporting part 102 includes a second supporting surface 102A that fits on the second connecting surface 321 .
  • the first electrode lead-out part 2a further includes a first connection part 222 extending along the first direction x
  • the second electrode lead-out part 3a further includes a second connection part 322 extending along the first direction x.
  • the sheet 10 includes a third support portion 103 connected to the first support portion 101 and a fourth support portion 104 connected to the second support portion 102, the third support portion 103 is used to support the first connection portion 222, and the fourth support portion 104 Used to support the second connecting portion 322 .
  • the supporting ability of the adapter sheet 10 to the first electrode lead-out part 2a and the second electrode lead-out part 3a can be further improved, and the first electrode lead-out part 2a and the second electrode can be reinforced.
  • the connection between the lead-out parts 3a improves the extrusion resistance of the first electrode lead-out part 2a and the second electrode lead-out part 3a.
  • the first connection surface 221 is disposed on the first positive tab 22, the second connection surface 321 is disposed on the second positive tab 32, and the first negative tab 23 may include a third connection inclined relative to the first direction x.
  • the second negative tab 33 may include a fourth connection surface inclined relative to the first direction x, and the third connection surface is electrically connected to the fourth connection surface.
  • another adapter sheet may be provided between the third connection surface and the fourth connection surface, and the structure of the adapter sheet may be the same as or different from that of the adapter sheet 10 .
  • three or more battery cells may be arranged in the casing 1, and the three or more battery cells are arranged along the first direction x.
  • the first battery cell 2 and the second battery cell 3 may be connected in series, in parallel or in parallel.
  • the first electrode drawing part 2a includes a first positive tab 22 and a first negative tab 23, the second electrode drawing part 3a includes a second positive tab 32 and a second negative tab 33, and the first positive tab 22 and The second positive tab 32 is electrically connected, and the first negative tab 23 and the second negative tab 33 are electrically connected.
  • the parallel connection of the first battery cell 2 and the second battery cell 3 is realized.
  • the parallel connection between the first battery cell 2 and the second battery cell 3 can reduce the risk of a short circuit in a local circuit, and can also prevent the electrolyte from being in a high-voltage environment.
  • the third electrode lead-out part 2 b includes a third tab 24
  • the fourth electrode lead-out part 3 b includes a fourth tab 34
  • the polarity of the third tab 24 is opposite to that of the fourth tab 34 .
  • the third tab 24 is a positive tab
  • the fourth tab 34 is a negative tab; or, the third tab 24 is a negative tab, and the fourth tab 34 is a positive tab.
  • the first cell 2 and the second cell 3 respectively include three tabs.
  • two tabs are extended from the first side S1 of the first main body part 21, which are respectively the first positive tab 22 and the first negative tab 23; the third side S3 of the first main body part 21 extends one tab, namely The third tab 24 .
  • Two tabs extend from the second side S2 of the second body part 31, namely the second positive tab 32 and the second negative tab 33; the fourth side S4 of the second main part 31 extends one tab, namely the fourth pole ear 34.
  • the first side S1 of the first body part 21 and the second side S2 of the second body part 31 are adjacent to and opposite to each other, and the first side S1 and the second side S2 are both located between the third side S3 and the third side S3 of the first body part 21. Between the fourth side S4 of the second body part 31 .
  • the battery cell further includes a first pole 61 and a second pole 71, the first pole 61 is electrically connected to the third pole 24, and the second pole 71 is electrically connected to the fourth pole 34 .
  • the battery cell includes two poles, the two poles are respectively connected with the third tab 24 extending from the third side S3 of the first body part 21 and the fourth side S4 of the second body part 31 The extended fourth tab 34 is electrically connected.
  • the battery cell further includes a first cover plate 4 and a second cover plate 5, the casing 1 is provided with a first opening 11 and a second opening 12 oppositely arranged along the first direction x, the first cover plate 4 and the second cover plate 5 are closed in the first opening 11 and the second opening 12 respectively, the first pole 61 is disposed on the first cover 4 , and the second pole 71 is disposed on the second cover 5 .
  • the first opening 11 and the second opening 12 are arranged opposite to each other along the first direction x, therefore, the first cover plate 4 enclosed in the first opening 11 is close to the third tab 24, and the first pole 61 is arranged on the first cover plate 4, so the distance between the third pole 24 and the first pole 61 can be effectively shortened, the connection between the third pole 24 and the first pole 61 is convenient, and it is also beneficial to shorten the distance between the third pole 24 and the first pole 61.
  • the length of the third tab 24 further reduces the occupied space of the third tab 24 and reduces the volume of the battery cell.
  • the second cover plate 5 enclosed in the second opening 12 is close to the fourth pole ear 34, and the second pole 71 is arranged on the second cover plate 5, so the connection between the fourth pole ear 34 and the second pole can be effectively shortened.
  • the distance between the poles 71 facilitates the connection between the fourth pole 34 and the second pole 71, and is also conducive to shortening the length of the fourth pole 34, thereby reducing the occupied space of the fourth pole 34 and reducing the battery cell. body volume.
  • the first body part 21 includes a first positive electrode sheet, a first negative electrode sheet and a first separator, the first positive electrode sheet and the first negative electrode sheet are wound or stacked to form the first body part 21, and the first separator is provided Between the first positive electrode sheet and the first negative electrode sheet, when the third tab 24 is a positive tab, the first end of the first positive electrode sheet extends from the third side S3 of the first main body part 21 to form a third tab 24.
  • the first end of the first negative electrode sheet is flush with the third side S3 of the first main body part 21;
  • the third side S3 is extended to form a third tab 24 , and the first end of the first positive electrode sheet is flush with the third side S3 of the first main body 21 .
  • the pole piece opposite to the polarity of the third pole lug 24 can be flush with the third side S3, the pole piece can not protrude, thereby shortening the length of the pole piece, which can not only save the cost of the pole piece
  • the material can also reduce the related operations of insulating the pole piece, and omit the insulating parts used to insulate the pole piece from other live parts.
  • the third tab 24 is a negative tab, the length of the first positive plate is d1, the length of the first negative plate is d2, and d2>d1.
  • the second body part 31 includes a second positive electrode sheet, a second negative electrode sheet and a second separator, the second positive electrode sheet and the second negative electrode sheet are wound or laminated to form the second body part 31, and the second separator is provided Between the second positive electrode piece and the second negative electrode piece, when the fourth pole tab 34 is a positive pole piece, the first end of the second positive pole piece extends from the fourth side S4 of the second main body portion 31 to form a fourth pole tab 34.
  • the first end of the second negative electrode sheet is flush with the fourth side S4 of the second main body part 31;
  • the fourth side S4 is extended to form a fourth tab 34 , and the first end of the second positive electrode sheet is flush with the fourth side S4 of the second main body 31 .
  • the pole piece By arranging the polar piece opposite to the polarity of the fourth pole lug 34 to be flush with the fourth side S4, the pole piece can not protrude, thereby shortening the length of the pole piece, which can not only save the cost of the pole piece
  • the material can also reduce the related operations of insulating the pole piece, and omit the insulating parts used to insulate the pole piece from other live parts.
  • the fourth tab 34 is a positive tab
  • the length of the second positive tab is d3
  • the length of the second negative tab is d4
  • the third electrode drawing part 2 b includes a third positive tab 25 and a third negative tab 26
  • the fourth electrode drawing part 3 b includes a fourth positive tab 35 and a fourth negative tab 36 .
  • the first cell 2 and the second cell 3 respectively include four tabs.
  • two tabs are extended from the first side S1 of the first main body part 21, which are respectively the first positive tab 22 and the first negative tab 23; the third side S3 of the first main body part 21 also extends two tabs. , are the third positive tab 25 and the third negative tab 26 respectively.
  • Two tabs extend from the second side S2 of the second main body 31, which are respectively the second positive tab 32 and the second negative tab 33; the fourth side S4 of the second main body 31 also extends two tabs, respectively. These are the fourth positive tab 35 and the fourth negative tab 36 .
  • the first side S1 of the first body part 21 and the second side S2 of the second body part 31 are adjacent to and opposite to each other, and the first side S1 and the second side S2 are both located between the third side S3 and the third side S3 of the first body part 21. Between the fourth side S4 of the second body part 31 .
  • the battery cell further includes a first pole 61 , a second pole 71 , a third pole 62 and a fourth pole 72 , the first pole 61 is electrically connected to the third positive tab 25 , the second The three poles 62 are electrically connected to the third negative tab 26 , the second pole 71 is electrically connected to the fourth positive tab 35 , and the fourth pole 72 is electrically connected to the fourth negative tab 36 .
  • the battery cell includes four poles, and the four poles respectively extend from the two tabs extending from the third side S3 of the first body part 21 and the fourth side S4 of the second body part 31 The two tabs out are electrically connected. By setting four poles, the overcurrent capability of the cell can be effectively improved.
  • the battery cell further includes a first cover plate 4 and a second cover plate 5, the casing 1 is provided with a first opening 11 and a second opening 12 oppositely arranged along the first direction x, the first cover plate 4 and the second cover plate 5 are respectively closed in the first opening 11 and the second opening 12, the first pole 61 and the third pole 62 are both arranged on the first cover 4, the second pole 71 and the fourth pole
  • the pillars 72 are all disposed on the second cover plate 5 .
  • the first opening 11 and the second opening 12 are arranged opposite to each other along the first direction x, therefore, the first cover plate 4 enclosed in the first opening 11 is close to the third positive tab 25 and the third negative tab 26 , and both the first pole 61 and the third pole 62 are set on the first cover plate 4, so the distance between the first pole 61 and the third positive tab 25 and between the third pole 62 and the third negative pole can be effectively shortened.
  • the distance between the ears 26 facilitates the connection between the first pole 61 and the third positive pole 25 and the third pole 62 and the third negative pole 26, and also helps to shorten the distance between the third positive pole 25 and the third negative pole 26.
  • the second cover plate 5 closed to the second opening 12 is close to the fourth positive tab 35 and the fourth negative tab 36, and the second pole 71 and the fourth pole 72 are arranged on the second cover 5, so The distance between the second pole 71 and the fourth positive pole 35 and the distance between the fourth pole 72 and the fourth negative pole 36 can be effectively shortened, which facilitates the connection between the second pole 71 and the fourth positive pole 35 and the fourth pole.
  • connection between 72 and the fourth negative tab 36 is also conducive to shortening the length of the fourth positive tab 35 and the fourth negative tab 36, thereby reducing the occupied space of the fourth positive tab 35 and the fourth negative tab 36, and reducing the size of the battery cell. body volume.
  • the housing 1, the first cover 4 and the second cover 5 may be independent components, or the housing 1, the first cover 4 and the second cover 5 may be integrated, specifically , the first cover plate 4 and the second cover plate 5 can respectively form a common connection surface with the housing 1 before other components are packed into the shell, and when the housing 1 needs to be packaged, the first cover plate 4 and the The second cover plate 5 covers the casing 1 and packages the casing 1 together with the first cover plate 4 and the second cover plate 5 as a whole.
  • the casing 1 is a component for cooperating with the first cover plate 4 and the second cover plate 5 to form the internal environment of the battery cell 20a.
  • the first cover plate 4 and the second cover plate 5 cover the opening of the casing 1
  • a member for isolating the internal environment of the battery cell 20a from the external environment is provided.
  • the shapes of the first cover plate 4 and the second cover plate 5 can be adapted to the shape of the housing 1 to match the housing 1 .
  • the first cover plate 4 and the second cover plate 5 can be made of a material with a certain hardness and strength, so that the first cover plate 4 and the second cover plate 5 are not easily deformed when they are squeezed and expanded , so that the battery cell 20a can have higher structural strength, and the safety performance can also be improved.
  • the first cover plate 4 and the second cover plate 5 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20a reaches a threshold value.
  • the length direction of the first cell 2 is parallel to the first direction x
  • the length direction of the second cell 3 is parallel to the first direction x.
  • the battery cell further includes a bracket 8 disposed between the first cell 2 and the second cell 3 .
  • the bracket 8 is used to support the first electric core 2 and the second electric core 3 .
  • the battery cell includes a casing 1 and a first cell 2 and a second cell 3 disposed inside the casing 1 .
  • the housing 1 may be in the shape of a cuboid.
  • the first electric core 2 and the second electric core 3 may also be in the shape of a cuboid.
  • the length of the casing 1 is greater than the sum of the lengths of the first electric core 2 and the second electric core 3 .
  • the first electric core 2 and the second electric core 3 are arranged inside the casing 1 along the length direction.
  • the longitudinal direction of the first electric core 2 , the longitudinal direction of the second electric core 3 and the longitudinal direction of the housing 1 are parallel.
  • Both ends of the housing 1 are respectively provided with a first opening 11 and a second opening 12 , and the planes where the first opening 11 and the second opening 12 are located are perpendicular to the length direction of the housing 1 .
  • the first cover 4 is closed to the first opening 11
  • the second cover 5 is closed to the second opening 12 .
  • a bracket 8 located between the first cell 2 and the second cell 3 is also provided in the housing 1 .
  • the side of the housing 1 is provided with an explosion-proof valve 9 and a patch 9a attached to the outside of the explosion-proof valve 9 .
  • the first cell 2 and the second cell 3 respectively include three tabs.
  • the first electric core 2 includes a first main body portion 21, and two tabs extend from the first side S1 of the first main body portion 21, which are respectively a first positive tab 22 and a first negative tab 23; A tab extends from the three sides S3 , that is, the third tab 24 .
  • the second electric core 3 includes a second main body portion 31, and two tabs extend from the second side S2 of the second main body portion 31, which are respectively the second positive tab 32 and the second negative tab 33; the second tab of the second main body 31 A tab extends from the four sides S4 , that is, the fourth tab 34 .
  • the first side S1 of the first body part 21 and the second side S2 of the second body part 31 are adjacent to and opposite to each other, and the first side S1 and the second side S2 are both located between the third side S3 and the third side S3 of the first body part 21. Between the fourth side S4 of the second body part 31 .
  • the battery cell includes two poles, the first pole 61 is arranged on the first cover 4 and is electrically connected to the third tab 24, and the second pole 71 is arranged on the second cover plate 5 and is electrically connected to the fourth tab 34 .
  • the first positive tab 22 is electrically connected to the second positive tab 32
  • the first negative tab 23 is electrically connected to the second negative tab 33 .
  • the first positive tab 22 and the second positive tab 32 may be directly attached to each other and electrically connected, or may be connected through the adapter piece 10 .
  • the electrical connection between the first negative pole tab 23 and the second negative pole tab 33 can be directly bonded and electrically connected to each other, or can be connected through another adapter piece 10 .
  • the first positive tab 22 includes an L-shaped connection portion, and the connection portion includes a first connection surface 221 perpendicular to the first direction x.
  • the second positive tab 32 includes an L-shaped connection portion, and the connection portion includes a second connection surface 321 perpendicular to the first direction x.
  • the first positive tab 22 and the second positive tab 32 are welded to the second connection surface 321 through the first connection surface 221 .
  • the first connection surface 221 and the second connection surface 321 are attached to each other.
  • the adapter plate 10 is connected between the first connection surface 221 and the second connection surface 321 .
  • the adapter piece 10 is in the shape of " ⁇ " as a whole.
  • the adapter piece 10 includes a first support part 101, a second support part 102, a third support part 103 and a fourth support part 104, the first support part 101 and the second support part 102 are connected into a U-shaped structure, and the first support part A groove 105 is formed between the support portion 101 and the second support portion 102 .
  • the third supporting part 103 is connected with the first supporting part 101
  • the fourth supporting part 104 is connected with the second supporting part 102 .
  • the first support portion 101 and the second support portion 102 respectively include a portion perpendicular to the length direction of the housing 1 and a portion parallel to the length direction of the housing 1 .
  • Both the third supporting portion 103 and the fourth supporting portion 104 are parallel to the longitudinal direction of the casing 1 .
  • the first positive tab 22 includes an L-shaped connection portion, which includes a first connection portion 222 parallel to the length direction of the case 1 and a third connection portion perpendicular to the length direction of the case 1 , the first connection surface 221 is located at The third connecting part.
  • the second positive tab 32 includes an L-shaped connection portion, which includes a second connection portion 322 parallel to the length direction of the case 1 and a fourth connection portion perpendicular to the length direction of the case 1 , the second connection surface 321 is located on The fourth connection part.
  • the first supporting part 101 is used to support the third connecting part, and the first supporting surface 101A of the first supporting part 101 and the first connecting surface 221 are attached to each other and connected by welding.
  • the second supporting part 102 is used to support the fourth connecting part, and the second supporting surface 102A of the second supporting part 102 and the second connecting surface 321 are attached to each other and connected by welding.
  • the third supporting part 103 is used for supporting the first connecting part 222
  • the fourth supporting part 104 is used for supporting the second connecting part 322 .
  • the first diaphragm is arranged between the first positive electrode sheet and the first negative electrode sheet, the third tab 24 is the negative electrode tab, the first end of the first negative electrode sheet is separated from the first body part
  • the third side S3 of 21 is extended to form a third tab 24 , and the first end of the first positive electrode sheet is flush with the third side S3 of the first main body 21 .
  • the length of the first positive electrode sheet is d1, the length of the first negative electrode sheet is d2, and d2>d1.
  • the second diaphragm is arranged between the second positive electrode sheet and the second negative electrode sheet, the fourth tab 34 is a positive electrode tab, and the first end of the second positive electrode sheet is separated from the second body part.
  • the fourth side S4 of 31 is extended to form a fourth tab 34 , and the first end of the second negative electrode sheet is flush with the fourth side S4 of the second main body 31 .
  • the length of the second positive electrode sheet is d3, the length of the second negative electrode sheet is d4, and d3>d4.
  • the first cell 2 and the second cell 3 respectively include four tabs.
  • two tabs are extended from the first side S1 of the first main body part 21, which are respectively the first positive tab 22 and the first negative tab 23; the third side S3 of the first main body part 21 also extends two tabs. , are the third positive tab 25 and the third negative tab 26 respectively.
  • Two tabs extend from the second side S2 of the second main body 31, which are respectively the second positive tab 32 and the second negative tab 33; the fourth side S4 of the second main body 31 also extends two tabs, respectively. These are the fourth positive tab 35 and the fourth negative tab 36 .
  • the battery cell includes four poles, the first pole 61 is electrically connected to the third positive tab 25, the third pole 62 is electrically connected to the third negative tab 26, and the second pole 71 is electrically connected to the third tab 26.
  • the four positive tabs 35 are electrically connected, and the fourth pole 72 is electrically connected to the fourth negative tab 36 .
  • Both the first pole 61 and the third pole 62 are disposed on the first cover 4
  • the second pole 71 and the fourth pole 72 are both disposed on the second cover 5 .
  • two poles are respectively arranged on both sides of the battery cell, so that the flow capacity is better.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
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  • Connection Of Batteries Or Terminals (AREA)
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Abstract

本申请实施例提供一种电池单体、电池和用电设备，其中电池单体包括壳体、第一电芯和第二电芯，第一电芯设置于壳体的内部，第一电芯包括第一主体部以及自第一主体部的第一侧面延伸出的第一电极引出部件，第二电芯设置于壳体的内部，第二电芯包括第二主体部以及自第二主体部的第二侧面延伸出的第二电极引出部件，其中，第一电芯和第二电芯沿第一方向布置，且第一主体部的第一侧面和第二主体部的第二侧面相邻且相对布置，第一电极引出部件包括相对于第一方向倾斜的第一连接面，第二电极引出部件包括相对于第一方向倾斜的第二连接面，第一连接面与第二连接面电连接。本申请的电池单体的抗挤压能力较强，可以有效保护电芯。

Description

电池单体、电池以及用电设备
相关申请的横向引用
本申请是以申请号为 202210180826.5，申请日为 2022年2月25日的中国申请为基础，并主张其优先权，该中国申请的公开内容在此作为整体引入本申请中。
技术领域
本申请涉及电池技术领域，特别是涉及一种电池单体、电池和用电设备。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电芯在电池内部可能会受到挤压力，电芯抵抗挤压的能力会影响电池的使用寿命。
发明内容
本申请提供一种电池单体、电池和用电设备，可以提高电芯的抗挤压能力。
第一方面，本申请提供一种电池单体，包括壳体、第一电芯和第二电芯，第一电芯设置于壳体的内部，第一电芯包括第一主体部以及自第一主体部的第一侧面延伸出的第一电极引出部件，第二电芯设置于壳体的内部，第二电芯包括第二主体部以及自第二主体部的第二侧面延伸出的第二电极引出部件；其中，第一电芯和第二电芯沿第一方向布置，且第一主体部的第一侧面和第二主体部的第二侧面相邻且相对布置，第一电极引出部件包括相对于第一方向倾斜的第一连接面，第二电极引出部件包括相对于第一方向倾斜的第二连接面，第一连接面与第二连接面电连接。
通过设置相对于第一方向倾斜的第一连接面和相对于第一方向倾斜的第二连接面，并使得第一电极引出部件和第三电极引出部件通过第一连接面与第二连接面电连接，可以在与第一方向垂直的方向上分解一部分使第一电芯和第二电芯相互靠近的挤压力，从而缓解第一电极引出部件和第三电极引出部件所受到的挤压冲击，进而提高第一电芯和第二电芯的使用寿命。
另外，通过将第一连接面和第二连接面设置为相对于第一方向倾斜，还可以缩短 第一电极引出部件和第三电极引出部件沿第一方向的长度，从而节省第一电极引出部件和第三电极引出部件的占用空间，实现减小电池单体的体积的目的。
在一些实施例中，第一连接面为平面且与第一方向垂直；和/或，第二连接面为平面且与第一方向垂直。将第一连接面和第二连接面设置为与第一方向垂直的平面，可以通过第一连接面和第二连接面承担挤压力，较大程度地缓解第一电极引出部件和第三电极引出部件受到的冲击，提高第一电芯和第二电芯的使用寿命；还可以较大程度地节省第一电极引出部件和第三电极引出部件的占用空间，减小电池单体的体积，提升电池单体的能量密度。
在一些实施例中，电池单体还包括转接片，转接片连接于第一连接面和第二连接面之间。通过在第一连接面和第二连接面之间设置转接片，可以提高第一电芯和第二电芯抵抗挤压的能力，进而提高第一电芯和第二电芯的使用寿命。通过设置转接片，还可以降低第一电极引出部件和第三电极引出部件在受到挤压时插入彼此的风险。
在一些实施例中，转接片包括可压缩部。可压缩部具有变形能力，通过可压缩部的变形缓解挤压力。可压缩部可以包括弹性部或者具有凹槽的部件。弹性部可以采用弹簧或者橡胶垫等。
在一些实施例中，转接片包括相互连接的第一支撑部和第二支撑部，第一支撑部支撑于第一连接面，第二支撑部支撑于第二连接面，第一支撑部和第二支撑部之间设有凹槽。通过设置凹槽，使得转接片具备可压缩能力，在第一支撑部或第二支撑部受到挤压力时，由于凹槽的存在，第一支撑部或第二支撑部可以向靠近彼此的方向倾斜，从而吸收一部分挤压力，降低对第一电极引出部件和第三电极引出部件的冲击，有效保护第一电芯和第二电芯。
在一些实施例中，第一支撑部包括与第一连接面贴合的第一支撑面，第二支撑部包括与第二连接面贴合的第二支撑面。通过设置与第一连接面贴合的第一支撑面和与第二连接面贴合的第二支撑面，可以提高第一支撑部和第二支撑部分别对第一连接面和第二连接面的支撑稳定性。
在一些实施例中，第一电极引出部件还包括沿第一方向延伸的第一连接部，第二电极引出部件还包括沿第一方向延伸的第二连接部，转接片包括与第一支撑部连接的第三支撑部和与第二支撑部连接的第四支撑部，第三支撑部用于支撑第一连接部，第四支撑部用于支撑第二连接部。通过设置第三支撑部和第四支撑部，可以进一步提高转接片对第一电极引出部件和第三电极引出部件的支撑能力，加固第一电极引出部件和第三电极引出部件之间的连接，提高第一电极引出部件和第三电极引出部件抵抗挤压的能力。
在一些实施例中，第一电极引出部件包括第一正极耳和第一负极耳，第二电极引出部件包括第二正极耳和第二负极耳，第一正极耳与第二正极耳电连接，第一负极耳和第二负极耳电连接。这样实现了第一电芯和第二电芯的并联连接。相比串联连接来说，第一电芯和第二电芯之间采用并联连接，可以降低局部回路发生短路的风险，也可以避免电解液处于高压环境中。
在一些实施例中，第一电芯的长度方向与第一方向平行，第二电芯的长度方向与第一方向平行。这样布置可以使第一电芯和第二电芯沿其长度方向布置，而且分别从第一电芯和第二电芯的两端延伸出的电极引出部件可以位于电芯较短的边上，从而有效缩小电池单体的体积。
在一些实施例中，第一电芯包括自第一主体部的与第一侧面相对的第三侧面引出的第三极耳，第二电芯包括自第二主体部的与第二侧面相对的第四侧面引出的第四极耳，第三极耳与第四极耳的极性相反。第一电芯和第二电芯分别包括三个极耳。
在一些实施例中，电池单体还包括第一极柱和第二极柱，第一极柱与第三极耳电连接，第二极柱与第四极耳电连接。在该实施例中，电池单体包括两个极柱，两个极柱分别与第一主体部的第二侧面延伸出的第三极耳和第二主体部的第四侧面延伸出的第四极耳电连接。
在一些实施例中，电池单体还包括第一盖板和第二盖板，壳体设有沿第一方向相对设置的第一开口和第二开口，第一盖板和第二盖板分别封闭于第一开口和第二开口，第一极柱设置于第一盖板上，第二极柱设置于第二盖板上。
在本申请实施例中，第一开口和第二开口沿第一方向相对布置，因此，封闭于第一开口的第一盖板靠近第三极耳，而且第一极柱设置于第一盖板上，因此可以有效缩短第三极耳与第一极柱之间的距离，方便第三极耳与第一极柱的连接，也有利于缩短第三极耳的长度，进而减小第三极耳的占用空间，减小电池单体的体积。同样地，封闭于第二开口的第二盖板靠近第四极耳，而且第二极柱设置于第二盖板上，因此可以有效缩短第四极耳与第二极柱之间的距离，方便第四极耳与第二极柱的连接，也有利于缩短第四极耳的长度，进而减小第四极耳的占用空间，减小电池单体的体积。
在一些实施例中，
第一主体部包括第一正极片、第一负极片和第一隔膜，第一正极片和第一负极片卷绕或层叠形成第一主体部，第一隔膜设置于第一正极片和第一负极片之间，第一正极片的第一端自第一主体部的第三侧面延伸出来形成第三极耳，第一负极片的第一端与第一主体部的第三侧面齐平；或者，第一负极片的第一端自第一主体部的第三侧面延伸出 来形成第三极耳，第一正极片的第一端与第一主体部的第三侧面齐平；和/或，
第二主体部包括第二正极片、第二负极片和第二隔膜，第二正极片和第二负极片卷绕或层叠形成第二主体部，第二隔膜设置于第二正极片和第二负极片之间，第二正极片的第一端自第二主体部的第四侧面延伸出来形成第四极耳，第二负极片的第一端与第二主体部的第四侧面齐平；或者，第二负极片的第一端自第二主体部的第四侧面延伸出来形成第四极耳，第二正极片的第一端与第二主体部的第四侧面齐平。
通过将与第三极耳的极性相反的极片设置为与第三侧面齐平，可以使该极片不伸出，从而缩短该极片的长度，这样不仅可以节约该极片的材料，还可以减少对该极片进行绝缘处理的相关操作，省略用于使该极片与其他带电部件绝缘的绝缘部件。
通过将与第四极耳的极性相反的极片设置为与第四侧面齐平，可以使该极片不伸出，从而缩短该极片的长度，这样不仅可以节约该极片的材料，还可以减少对该极片进行绝缘处理的相关操作，省略用于使该极片与其他带电部件绝缘的绝缘部件。
在一些实施例中，第一电芯包括自第一主体部的与第一侧面相对的第三侧面引出的第三正极耳和第三负极耳，第二电芯包括自第二主体部的与第二侧面相对的第四侧面引出的第四正极耳和第四负极耳。第一电芯和第二电芯分别包括四个极耳。
在一些实施例中，电池单体还包括第一极柱、第二极柱、第三极柱和第四极柱，第一极柱与第三正极耳电连接，第三极柱与第三负极耳电连接，第二极柱与第四正极耳电连接，第四极柱与第四负极耳电连接。在该实施例中，电池单体包括四个极柱，四个极柱分别与第一主体部的第二侧面延伸出的两个极耳和第二主体部的第四侧面延伸出的两个极耳电连接。通过设置四个极柱，可以有效提升电芯的过流能力。
在一些实施例中，电池单体还包括第一盖板和第二盖板，壳体设有沿第一方向相对设置的第一开口和第二开口，第一盖板和第二盖板分别封闭于第一开口和第二开口，第一极柱和第三极柱均设置于第一盖板上，第二极柱和第四极柱均设置于第二盖板上。
在本申请实施例中，第一开口和第二开口沿第一方向相对布置，因此，封闭于第一开口的第一盖板靠近第三正极耳和第三负极耳，而且第一极柱和第三极柱均设置于第一盖板上，因此可以有效缩短第一极柱与第三正极耳之间以及第三极柱与第三负极耳之间的距离，方便第一极柱与第三正极耳以及第三极柱与第三负极耳的连接，也有利于缩短第三正极耳和第三负极耳的长度，进而减小第三正极耳和第三负极耳的占用空间，减小电池单体的体积。同样地，封闭于第二开口的第二盖板靠近第四正极耳和第四负极耳，而且第二极柱和第四极柱设置于第二盖板上，因此可以有效缩短第二极柱与第四正极耳之间以及第四极柱与第四负极耳之间的距离，方便第二极柱与第四正极耳以及第四极柱 与第四负极耳的连接，也有利于缩短第四正极耳和第四负极耳的长度，进而减小第四正极耳和第四负极耳的占用空间，减小电池单体的体积。
第二方面，本申请提供一种电池，包括上述实施例中的电池单体。
第三方面，本申请提供一种用电设备，包括上述实施例中的电池单体和/或电池，用于向用电设备供应电能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本申请公开的用电设备一些实施例的结构示意图；
图2是本申请公开的电池一些实施例的结构示意图；
图3是本申请公开的电池单体一些实施例的爆炸图；
图4是本申请公开的电池单体一些实施例的结构示意图；
图5是本申请公开的电池单体一些实施例的主视图；
图6是本申请公开的电池单体一些实施例的俯视图；
图7是图6中标号A所示部分的放大图；
图8是本申请公开的电池单体另一些实施例的俯视图；
图9是图8中标号B所示部分的放大图；
图10是本申请公开的电池单体一些实施例中第一电芯的结构示意图；
图11是本申请公开的电池单体一些实施例中第二电芯的结构示意图；
图12是本申请公开的电池单体另一些实施例的爆炸图；
图13是本申请公开的电池单体另一些实施例的结构示意图；
图14是本申请公开的电池单体另一些实施例的主视图。
在附图中，附图并未按照实际的比例绘制。
标记说明：
1000、车辆；100、电池；200、控制器；300、马达；
10a、箱体；101a、第一盖体；102a、第二盖体；20a、电池单体；
1、壳体；11、第一开口；12、第二开口；
2、第一电芯；21、第一主体部；2a、第一电极引出部件；2b、第三电极引出部件；22、第一正极耳；221、第一连接面；222、第一连接部；23、第一负极耳；24、第三极耳；25、第三正极耳；26、第三负极耳；
3、第二电芯；31、第二主体部；3a、第二电极引出部件；3b、第四电极引出部件；32、第二正极耳；321、第二连接面；322、第二连接部；33、第二负极耳；34、第四极耳；35、第四正极耳；36、第四负极耳；
4、第一盖板；5、第二盖板；61、第一极柱；62、第三极柱；71、第二极柱；72、第四极柱；8、支架；9、防爆阀；9a、贴片；
10、转接片；101、第一支撑部；101A、第一支撑面；102、第二支撑部；102A、第二支撑面；103、第三支撑部；104、第四支撑部；105、凹槽；
x、第一方向；S1、第一侧面；S2、第二侧面；S3、第三侧面；S4、第四侧面。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。此外，术语“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系， 表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上，除非另有明确具体的限定。同理，“多组”指的是两组以上，“多片”指的是两片以上，除非另有明确具体的限定。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
随着动力电池的不断普及，用户对动力电池的容量提出了更高的要求。本申请的发明人注意到，为了满足逐渐提高的容量需求，很多设计者选择加大电芯的长度。
但是，经过研究，本申请的发明人发现，长电芯在卷绕制造过程中，极易出现极片打皱的问题，影响生产效率。
为了解决极片打皱问题，可以在一个电池单体内设置多个常规长度的电芯，这样既可以避免长电芯制造过程中极易出现的极片打皱问题，又可以通过增加电池的数量实现增大电池容量的目的。而且，相比于在每一个常规长度的电芯的外部设置壳体和电连接部件的方案来说，将多个电芯布置于同一个壳体内，可以有效节省一些装配工序，还可以节省一些电连接部件等，因此可以大大节约成本。
进一步地，本申请的发明人考虑到，在同一个壳体内设置多个电芯时会面临两个电芯之间的连接问题。在相关技术中，两个电芯之间的电连接部的延伸方向与两个电芯的布置方向平行，这样在电芯受到挤压时存在电连接部互相插入的风险。
为了提高电芯的抗挤压能力，本申请的发明人提出，可以将两个电芯的电连接部设置于相对于两个电芯的布置方向倾斜，这样可以在与布置方向垂直的方向上分解一部分挤压力，从而缓解挤压冲击，有效保护电连接部，进而保护两个电芯，提高两个电芯的使用寿命。
基于以上思路，本申请的发明人对电池单体的结构进行了改进，有效提高了电芯的抗挤压能力。
本申请实施例提供一种包括电池单体的电池。电池可以但不限用于车辆、船舶或飞行器等用电设备中。可以使用具备本申请公开的电池单体、电池等组成该用电设备的电源系统。
本申请实施例提供一种使用电池作为电源的用电设备，电池被配置为对用电设备提供电能。用电设备可以为但不限于手机、便携式设备、笔记本电脑、电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等等，例如，航天器包括飞机、火箭、航天飞机和宇宙飞船等等，电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨。
以下实施例为了方便说明，以本申请一些实施例的一种用电设备为车辆1000为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，电池100用于为马达300以及车辆中其它部件的工作提供电能，控制器200用来控制马达300工作，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的电池100的爆炸图。电池100包括箱 体10a和电池单体20a，电池单体20a容纳于箱体10a内。其中，箱体10a用于为电池单体20a提供容纳空间，箱体10a可以采用多种结构。在一些实施例中，箱体10a可以包括第一盖体101a和第二盖体102a，第一盖体101a与第二盖体102a相互盖合，第一盖体101a和第二盖体102a共同限定出用于容纳电池单体20a的容纳空间。第二盖体102a可以为一端开口的空心结构，第一盖体101a可以为板状结构，第一盖体101a盖合于第二盖体102a的开口侧，以使第一盖体101a与第二盖体102a共同限定出容纳空间；第一盖体101a和第二盖体102a也可以均为一侧开口的空心结构，第一盖体101a的开口侧盖合于第二盖体102a的开口侧。当然，第一盖体101a和第二盖体102a形成的箱体10a可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体20a可以是多个，多个电池单体20a之间可串联或并联或混联，混联是指多个电池单体20a中既有串联又有并联。多个电池单体20a之间可直接串联或并联或混联在一起，再将多个电池单体20a构成的整体容纳于箱体10a内；当然，电池100也可以是多个电池单体20a先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10a内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体20a之间的电连接。
其中，电池单体20a是指组成电池的最小单元。电池单体20a包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本公开实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本公开实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本公开实施例对此也不限定。
请参照图3至7所示，分别为本申请一些实施例提供的电池单体20a的爆炸图、立体结构示意图、主视图和俯视图。在本申请提供的一些实施例中，电池单体20a包括壳体1、第一电芯2和第二电芯3，第一电芯2和第二电芯3均设置壳体1的内部。
壳体1是用于提供容纳空间以将第一电芯2和第二电芯3、电解液以及其他部件容纳于其内的部件。壳体1可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体1的形状可以根据第一电芯2和第二电芯3的具体形状和尺寸大小来确定。壳体1的材质可以选择铜、铁、铝、不锈钢、铝合金等金属材料或者塑胶等非金属材料。
如图5所示，第一电芯2设置于壳体1的内部，第一电芯2包括第一主体部21以及自第一主体部21的第一侧面S1延伸出的第一电极引出部件2a。第二电芯3设置于壳体1的内部，第二电芯3包括第二主体部31以及自第二主体部31的第二侧面S2延伸出的第 二电极引出部件3a。第一电芯2和第二电芯3沿第一方向x布置，且第一主体部21的第一侧面S1和第二主体部31的第二侧面S2相邻且相对布置。
如图5所示，带双箭头的指示线所示方向为第一方向x。在本申请提供的电池单体实施例中，第一电芯2和第二电芯3沿第一方向x布置，第一电芯2的中心线和第二电芯3的中心线共线且与第一方向x平行。第一电芯2的第一侧面S1和第二电芯3的第二侧面S2相邻且相对布置，以便使位于第一侧面S1的第一电极引出部件2a和位于第二侧面S2的第二电极引出部件3a相互靠近，并通过第一电极引出部件2a和第二电极引出部件3a的电连接实现第一电芯2和第二电芯3的电连接。同时，第一电芯2的与第一侧面S1相对的第三侧面S3和第二电芯3的与第二侧面S2相对的第四侧面S4彼此远离，第三侧面S3延伸出第三电极引出部件2b，第四侧面S4延伸出第四电极引出部件3b，第三电极引出部件2b第四电极引出部件3b可以分别作为电池单体的两个电极，从而使第一电芯2和第二电芯3的连接以及电池单体的两个电极连接部件均设置于第一方向x上，有利于优化电池单体的内部结构布置，从而有利于减小电池单体的体积。
如图7所示，第一电极引出部件2a包括相对于第一方向x倾斜的第一连接面221，第二电极引出部件3a包括相对于第一方向x倾斜的第二连接面321，第一连接面221与第二连接面321电连接。此处，“倾斜”的含义为与第一方向x成角度设置。
通过设置相对于第一方向x倾斜的第一连接面221和相对于第一方向x倾斜的第二连接面321，并使得第一电极引出部件2a和第二电极引出部件3a通过第一连接面221与第二连接面321电连接，可以在与第一方向x垂直的方向上分解一部分使第一电芯2和第二电芯3相互靠近的挤压力，从而缓解第一电极引出部件2a和第二电极引出部件3a所受到的挤压冲击，进而提高第一电芯2和第二电芯3的使用寿命。
另外，通过将第一连接面221和第二连接面321设置为相对于第一方向x倾斜，还可以缩短第一电极引出部件2a和第二电极引出部件3a沿第一方向x的长度，从而节省第一电极引出部件2a和第二电极引出部件3a的占用空间，实现减小电池单体的体积的目的。
在一些实施例中，第一连接面221为平面且与第一方向x垂直；和/或，第二连接面321为平面且与第一方向x垂直。将第一连接面221和第二连接面321设置为与第一方向x垂直的平面，可以通过第一连接面221和第二连接面321承担挤压力，较大程度地缓解第一电极引出部件2a和第二电极引出部件3a受到的冲击，提高第一电芯2和第二电芯3的使用寿命；还可以较大程度地节省第一电极引出部件2a和第二电极引出部件3a的占用空间，减小电池单体的体积，提升电池单体的能量密度。
如图9所示，在一些实施例中，电池单体还包括转接片10，转接片10连接于第一连接面221和第二连接面321之间。通过在第一连接面221和第二连接面321之间设置转接片10，可以提高第一电芯2和第二电芯3抵抗挤压的能力，进而提高第一电芯2和第二电芯3的使用寿命。通过设置转接片10，还可以降低第一电极引出部件2a和第二电极引出部件3a在受到挤压时插入彼此的风险。
在一些实施例中，转接片10包括可压缩部。可压缩部具有变形能力，通过可压缩部的变形缓解挤压力。可压缩部可以包括弹性部或者具有凹槽的部件。弹性部可以采用弹簧或者橡胶垫等。
在一些实施例中，转接片10包括相互连接的第一支撑部101和第二支撑部102，第一支撑部101支撑于第一连接面221，第二支撑部102支撑于第二连接面321，第一支撑部101和第二支撑部102之间设有凹槽105。通过设置凹槽105，使得转接片10具备可压缩能力，在第一支撑部101或第二支撑部102受到挤压力时，由于凹槽105的存在，第一支撑部101或第二支撑部102可以向靠近彼此的方向倾斜，从而吸收一部分挤压力，降低对第一电极引出部件2a和第二电极引出部件3a的冲击，有效保护第一电芯2和第二电芯3。
在一些实施例中，第一支撑部101包括与第一连接面221贴合的第一支撑面101A，第二支撑部102包括与第二连接面321贴合的第二支撑面102A。通过设置与第一连接面221贴合的第一支撑面101A和与第二连接面321贴合的第二支撑面102A，可以提高第一支撑部101和第二支撑部102分别对第一连接面221和第二连接面321的支撑稳定性。
在一些实施例中，第一电极引出部件2a还包括沿第一方向x延伸的第一连接部222，第二电极引出部件3a还包括沿第一方向x延伸的第二连接部322，转接片10包括与第一支撑部101连接的第三支撑部103和与第二支撑部102连接的第四支撑部104，第三支撑部103用于支撑第一连接部222，第四支撑部104用于支撑第二连接部322。
通过设置第三支撑部103和第四支撑部104，可以进一步提高转接片10对第一电极引出部件2a和第二电极引出部件3a的支撑能力，加固第一电极引出部件2a和第二电极引出部件3a之间的连接，提高第一电极引出部件2a和第二电极引出部件3a抵抗挤压的能力。
在一些实施例中，第一连接面221设置于第一正极耳22，第二连接面321设置于第二正极耳32，第一负极耳23可以包括相对于第一方向x倾斜的第三连接面，第二负极耳33可以包括相对于第一方向x倾斜的第四连接面，第三连接面与第四连接面电连接。
在一些实施例中，第三连接面和第四连接面之间可以设置另一转接片，该转接片 的结构与转接片10的结构可以相同，也可以不同。
在一些实施例中，壳体1内可以设置三个或更多个电芯，三个或更多个电芯沿第一方向x布置。
在一些实施例中，第一电芯2和第二电芯3可以串联、并联或者混联连接。
在一些实施例中，第一电极引出部件2a包括第一正极耳22和第一负极耳23，第二电极引出部件3a包括第二正极耳32和第二负极耳33，第一正极耳22与第二正极耳32电连接，第一负极耳23和第二负极耳33电连接。这样实现了第一电芯2和第二电芯3的并联连接。相比串联连接来说，第一电芯2和第二电芯3之间采用并联连接，可以降低局部回路发生短路的风险，也可以避免电解液处于高压环境中。
在一些实施例中，第三电极引出部件2b包括第三极耳24，第四电极引出部件3b包括第四极耳34，第三极耳24与第四极耳34的极性相反。第三极耳24为正极耳，第四极耳34为负极耳；或者，第三极耳24为负极耳，第四极耳34为正极耳。
在如图3至9所示的实施例中，第一电芯2和第二电芯3分别包括三个极耳。其中，第一主体部21的第一侧面S1延伸出两个极耳，分别为第一正极耳22和第一负极耳23；第一主体部21的第三侧面S3延伸出一个极耳，即第三极耳24。第二主体部31的第二侧面S2延伸出两个极耳，分别为第二正极耳32和第二负极耳33；第二主体部31的第四侧面S4延伸出一个极耳，即第四极耳34。第一主体部21的第一侧面S1和第二主体部31的第二侧面S2相邻且相对布置，而且第一侧面S1和第二侧面S2均位于第一主体部21的第三侧面S3和第二主体部31的第四侧面S4之间。
在一些实施例中，电池单体还包括第一极柱61和第二极柱71，第一极柱61与第三极耳24电连接，第二极柱71与第四极耳34电连接。在该实施例中，电池单体包括两个极柱，两个极柱分别与第一主体部21的第三侧面S3延伸出的第三极耳24和第二主体部31的第四侧面S4延伸出的第四极耳34电连接。
在一些实施例中，电池单体还包括第一盖板4和第二盖板5，壳体1设有沿第一方向x相对设置的第一开口11和第二开口12，第一盖板4和第二盖板5分别封闭于第一开口11和第二开口12，第一极柱61设置于第一盖板4上，第二极柱71设置于第二盖板5上。
在本申请实施例中，第一开口11和第二开口12沿第一方向x相对布置，因此，封闭于第一开口11的第一盖板4靠近第三极耳24，而且第一极柱61设置于第一盖板4上，因此可以有效缩短第三极耳24与第一极柱61之间的距离，方便第三极耳24与第一极柱61的连接，也有利于缩短第三极耳24的长度，进而减小第三极耳24的占用空间， 减小电池单体的体积。同样地，封闭于第二开口12的第二盖板5靠近第四极耳34，而且第二极柱71设置于第二盖板5上，因此可以有效缩短第四极耳34与第二极柱71之间的距离，方便第四极耳34与第二极柱71的连接，也有利于缩短第四极耳34的长度，进而减小第四极耳34的占用空间，减小电池单体的体积。
在一些实施例中，第一主体部21包括第一正极片、第一负极片和第一隔膜，第一正极片和第一负极片卷绕或层叠形成第一主体部21，第一隔膜设置于第一正极片和第一负极片之间，当第三极耳24为正极耳时，第一正极片的第一端自第一主体部21的第三侧面S3延伸出来形成第三极耳24，第一负极片的第一端与第一主体部21的第三侧面S3齐平；当第三极耳24为负极耳时，第一负极片的第一端自第一主体部21的第三侧面S3延伸出来形成第三极耳24，第一正极片的第一端与第一主体部21的第三侧面S3齐平。
通过将与第三极耳24的极性相反的极片设置为与第三侧面S3齐平，可以使该极片不伸出，从而缩短该极片的长度，这样不仅可以节约该极片的材料，还可以减少对该极片进行绝缘处理的相关操作，省略用于使该极片与其他带电部件绝缘的绝缘部件。
如图10所示，第三极耳24为负极耳，第一正极片的长度为d1，第一负极片的长度为d2，d2＞d1。
在一些实施例中，第二主体部31包括第二正极片、第二负极片和第二隔膜，第二正极片和第二负极片卷绕或层叠形成第二主体部31，第二隔膜设置于第二正极片和第二负极片之间，当第四极耳34为正极耳时，第二正极片的第一端自第二主体部31的第四侧面S4延伸出来形成第四极耳34，第二负极片的第一端与第二主体部31的第四侧面S4齐平；当第四极耳34为负极耳时，第二负极片的第一端自第二主体部31的第四侧面S4延伸出来形成第四极耳34，第二正极片的第一端与第二主体部31的第四侧面S4齐平。
通过将与第四极耳34的极性相反的极片设置为与第四侧面S4齐平，可以使该极片不伸出，从而缩短该极片的长度，这样不仅可以节约该极片的材料，还可以减少对该极片进行绝缘处理的相关操作，省略用于使该极片与其他带电部件绝缘的绝缘部件。
如图11所示，第四极耳34为正极耳，第二正极片的长度为d3，第二负极片的长度为d4，d3＞d4。
在一些实施例中，第三电极引出部件2b包括第三正极耳25和第三负极耳26，第四电极引出部件3b包括第四正极耳35和第四负极耳36。
在如图12至14所示的实施例中，第一电芯2和第二电芯3分别包括四个极耳。其中，第一主体部21的第一侧面S1延伸出两个极耳，分别为第一正极耳22和第一负极耳23；第一主体部21的第三侧面S3也延伸出两个极耳，分别为第三正极耳25和第三负 极耳26。第二主体部31的第二侧面S2延伸出两个极耳，分别为第二正极耳32和第二负极耳33；第二主体部31的第四侧面S4也延伸出两个极耳，分别为第四正极耳35和第四负极耳36。第一主体部21的第一侧面S1和第二主体部31的第二侧面S2相邻且相对布置，而且第一侧面S1和第二侧面S2均位于第一主体部21的第三侧面S3和第二主体部31的第四侧面S4之间。
在一些实施例中，电池单体还包括第一极柱61、第二极柱71、第三极柱62和第四极柱72，第一极柱61与第三正极耳25电连接，第三极柱62与第三负极耳26电连接，第二极柱71与第四正极耳35电连接，第四极柱72与第四负极耳36电连接。在该实施例中，电池单体包括四个极柱，四个极柱分别与第一主体部21的第三侧面S3延伸出的两个极耳和第二主体部31的第四侧面S4延伸出的两个极耳电连接。通过设置四个极柱，可以有效提升电芯的过流能力。
在一些实施例中，电池单体还包括第一盖板4和第二盖板5，壳体1设有沿第一方向x相对设置的第一开口11和第二开口12，第一盖板4和第二盖板5分别封闭于第一开口11和第二开口12，第一极柱61和第三极柱62均设置于第一盖板4上，第二极柱71和第四极柱72均设置于第二盖板5上。
在本申请实施例中，第一开口11和第二开口12沿第一方向x相对布置，因此，封闭于第一开口11的第一盖板4靠近第三正极耳25和第三负极耳26，而且第一极柱61和第三极柱62均设置于第一盖板4上，因此可以有效缩短第一极柱61与第三正极耳25之间以及第三极柱62与第三负极耳26之间的距离，方便第一极柱61与第三正极耳25以及第三极柱62与第三负极耳26的连接，也有利于缩短第三正极耳25和第三负极耳26的长度，进而减小第三正极耳25和第三负极耳26的占用空间，减小电池单体的体积。同样地，封闭于第二开口12的第二盖板5靠近第四正极耳35和第四负极耳36，而且第二极柱71和第四极柱72设置于第二盖板5上，因此可以有效缩短第二极柱71与第四正极耳35之间以及第四极柱72与第四负极耳36之间的距离，方便第二极柱71与第四正极耳35以及第四极柱72与第四负极耳36的连接，也有利于缩短第四正极耳35和第四负极耳36的长度，进而减小第四正极耳35和第四负极耳36的占用空间，减小电池单体的体积。
在一些实施例中，壳体1、第一盖板4和第二盖板5可以是独立的部件，也可以使壳体1、第一盖板4和第二盖板5一体化，具体地，第一盖板4、第二盖板5可以分别与壳体1在将其他部件装入壳前先形成一个共同的连接面，当需要封装壳体1时，再使第一盖板4和第二盖板5盖合壳体1，并将壳体1与第一盖板4和第二盖板5封装为一体。
壳体1是用于配合第一盖板4和第二盖板5以形成电池单体20a的内部环境的组 件，第一盖板4和第二盖板5是盖合于壳体1的开口处以将电池单体20a的内部环境隔绝于外部环境的部件。不限地，第一盖板4和第二盖板5的形状可以与壳体1的形状相适应以配合壳体1。可选地，第一盖板4和第二盖板5可以由具有一定硬度和强度的材质制成，这样，第一盖板4和第二盖板5在受挤压膨胀时就不易发生形变，使电池单体20a能够具备更高的结构强度，安全性能也可以有所提高。
在一些实施例中，第一盖板4和第二盖板5上还可以设置有用于在电池单体20a的内部压力或温度达到阈值时泄放内部压力的泄压机构。
在一些实施例中，第一电芯2的长度方向与第一方向x平行，第二电芯3的长度方向与第一方向x平行。这样布置可以使第一电芯2和第二电芯3沿其长度方向布置，而且分别从第一电芯2和第二电芯3的两端延伸出的电极引出部件可以位于电芯较短的边上，从而有效缩小电池单体的体积。
在一些实施例中，电池单体还包括支架8，支架8设置于第一电芯2和第二电芯3之间。支架8用于支撑第一电芯2和第二电芯3。
下面结合附图3至14，对本申请提供的电池单体的一些实施例的结构进行说明。
在本申请提供的电池单体的实施例中，电池单体包括壳体1以及设置于壳体1的内部的第一电芯2和第二电芯3。
壳体1可以为长方体形。第一电芯2和第二电芯3也可以为长方体形。
壳体1的长度大于第一电芯2的长度和第二电芯3的长度之和。第一电芯2和第二电芯3沿长度方向布置与壳体1的内部。第一电芯2的长度方向、第二电芯3的长度方向和壳体1的长度方向平行。
壳体1的两端分别设有第一开口11和第二开口12，第一开口11所在平面和第二开口12所在平面与壳体1的长度方向垂直。第一盖板4封闭于第一开口11，第二盖板5封闭于第二开口12。
壳体1内还设有位于第一电芯2和第二电芯3之间的支架8。壳体1的侧面设有防爆阀9和贴在防爆阀9外侧的贴片9a。
在如图3至9所示的实施例中，第一电芯2和第二电芯3分别包括三个极耳。第一电芯2包括第一主体部21，第一主体部21的第一侧面S1延伸出两个极耳，分别为第一正极耳22和第一负极耳23；第一主体部21的第三侧面S3延伸出一个极耳，即第三极耳24。第二电芯3包括第二主体部31，第二主体部31的第二侧面S2延伸出两个极耳，分别为第二正极耳32和第二负极耳33；第二主体部31的第四侧面S4延伸出一个极耳，即第四极耳34。第一主体部21的第一侧面S1和第二主体部31的第二侧面S2相邻且相对布 置，而且第一侧面S1和第二侧面S2均位于第一主体部21的第三侧面S3和第二主体部31的第四侧面S4之间。
如图3至5所示，电池单体包括两个极柱，第一极柱61设置于第一盖板4上并与第三极耳24电连接，第二极柱71设置于第二盖板5上并与第四极耳34电连接。
第一正极耳22与第二正极耳32电连接，第一负极耳23与第二负极耳33电连接。
第一正极耳22与第二正极耳32可以直接相互贴合并电连接，也可以通过转接片10进行连接。第一负极耳23与第二负极耳33电连接可以直接相互贴合并电连接，也可以通过另一转接片10进行连接。
在如图6和图7所示的实施例中，第一正极耳22包括L型连接部，该连接部包括与第一方向x垂直的第一连接面221。第二正极耳32包括L型连接部，该连接部包括与第一方向x垂直的第二连接面321。第一正极耳22和第二正极耳32通过第一连接面221与第二连接面321焊接连接。第一连接面221与第二连接面321相互贴合。
在如图8和图9所示的实施例中，转接片10连接于第一连接面221和第二连接面321之间。
转接片10整体呈“几”字形。转接片10包括第一支撑部101、第二支撑部102、第三支撑部103和第四支撑部104，第一支撑部101和第二支撑部102连接成U型结构，第一支撑部101和第二支撑部102之间形成凹槽105。第三支撑部103与第一支撑部101连接，第四支撑部104与第二支撑部102连接。第一支撑部101和第二支撑部102分别包括与壳体1的长度方向垂直的部分和与壳体1的长度方向平行的部分。第三支撑部103和第四支撑部104均与壳体1的长度方向平行。
第一正极耳22包括L型连接部，该连接部包括与壳体1的长度方向平行的第一连接部222和与壳体1的长度方向垂直的第三连接部，第一连接面221位于第三连接部。第二正极耳32包括L型连接部，该连接部包括与壳体1的长度方向平行的第二连接部322和与壳体1的长度方向垂直的第四连接部，第二连接面321位于第四连接部。
第一支撑部101用于支撑第三连接部，且第一支撑部101的第一支撑面101A与第一连接面221相互贴合并焊接连接。第二支撑部102用于支撑第四连接部，且第二支撑部102的第二支撑面102A与第二连接面321相互贴合并焊接连接。第三支撑部103用于支撑第一连接部222，第四支撑部104用于支撑第二连接部322。
对于包括三个极耳的第一电芯2来说，如图10所示，第一主体部21包括第一正极片、第一负极片和第一隔膜，第一正极片和第一负极片卷绕或层叠形成第一主体部21，第一隔膜设置于第一正极片和第一负极片之间，第三极耳24为负极耳，第一负极片的第 一端自第一主体部21的第三侧面S3延伸出来形成第三极耳24，第一正极片的第一端与第一主体部21的第三侧面S3齐平。第一正极片的长度为d1，第一负极片的长度为d2，d2＞d1。
对于包括三个极耳的第二电芯3来说，如图11所示，第二主体部31包括第二正极片、第二负极片和第二隔膜，第二正极片和第二负极片卷绕或层叠形成第二主体部31，第二隔膜设置于第二正极片和第二负极片之间，第四极耳34为正极耳，第二正极片的第一端自第二主体部31的第四侧面S4延伸出来形成第四极耳34，第二负极片的第一端与第二主体部31的第四侧面S4齐平。第二正极片的长度为d3，第二负极片的长度为d4，d3＞d4。
在如图12至14所示的实施例中，第一电芯2和第二电芯3分别包括四个极耳。其中，第一主体部21的第一侧面S1延伸出两个极耳，分别为第一正极耳22和第一负极耳23；第一主体部21的第三侧面S3也延伸出两个极耳，分别为第三正极耳25和第三负极耳26。第二主体部31的第二侧面S2延伸出两个极耳，分别为第二正极耳32和第二负极耳33；第二主体部31的第四侧面S4也延伸出两个极耳，分别为第四正极耳35和第四负极耳36。
在该实施例中，电池单体包括四个极柱，第一极柱61与第三正极耳25电连接，第三极柱62与第三负极耳26电连接，第二极柱71与第四正极耳35电连接，第四极柱72与第四负极耳36电连接。第一极柱61和第三极柱62均设置于第一盖板4上，第二极柱71和第四极柱72均设置于第二盖板5上。该实施例中的电池单体的两侧分别设有两个极柱，过流能力更优。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (18)

  1. 一种电池单体，包括：
    壳体(1)；
    第一电芯(2)，设置于所述壳体(1)的内部，所述第一电芯(2)包括第一主体部(21)以及自所述第一主体部(21)的第一侧面(S1)延伸出的第一电极引出部件(2a)；和
    第二电芯(3)，设置于所述壳体(1)的内部，所述第二电芯(3)包括第二主体部(31)以及自所述第二主体部(31)的第二侧面(S2)延伸出的第二电极引出部件(3a)；
    其中，所述第一电芯(2)和所述第二电芯(3)沿第一方向(x)布置，且所述第一主体部(21)的第一侧面(S1)和所述第二主体部(31)的第二侧面(S2)相邻且相对布置，所述第一电极引出部件(2a)包括相对于所述第一方向(x)倾斜的第一连接面(221)，所述第二电极引出部件(3a)包括相对于所述第一方向(x)倾斜的第二连接面(321)，所述第一连接面(221)与所述第二连接面(321)电连接。
  2. 根据权利要求1所述的电池单体，其中，所述第一连接面(221)为平面且与所述第一方向(x)垂直；和/或，所述第二连接面(321)为平面且与所述第一方向(x)垂直。
  3. 根据权利要求1或2所述的电池单体，其特征在于，还包括转接片(10)，所述转接片(10)连接于所述第一连接面(221)和所述第二连接面(321)之间。
  4. 根据权利要求3所述的电池单体，其中，所述转接片(10)包括可压缩部。
  5. 根据权利要求3或4所述的电池单体，其中，所述转接片(10)包括相互连接的第一支撑部(101)和第二支撑部(102)，所述第一支撑部(101)支撑于所述第一连接面(221)，所述第二支撑部(102)支撑于所述第二连接面(321)，所述第一支撑部(101)和所述第二支撑部(102)之间设有凹槽(105)。
  6. 根据权利要求5所述的电池单体，其中，所述第一支撑部(101)包括与所述第一连接面(221)贴合的第一支撑面(101A)，所述第二支撑部(102)包括与所述第二连接面(321)贴合的第二支撑面(102A)。
  7. 根据权利要求5或6所述的电池单体，其中，所述第一电极引出部件(2a)还包括沿所述第一方向(x)延伸的第一连接部(222)，所述第二电极引出部件(3a)还包括沿所述第一方向(x)延伸的第二连接部(322)，所述转接片(10)包括与所述第一支撑部(101)连接的第三支撑部(103)和与所述第二支撑部(102)连接的第四支撑部 (104)，所述第三支撑部(103)用于支撑所述第一连接部(222)，所述第四支撑部(104)用于支撑所述第二连接部(322)。
  8. 根据权利要求1至7任一项所述的电池单体，其中，所述第一电极引出部件(2a)包括第一正极耳(22)和第一负极耳(23)，所述第二电极引出部件(3a)包括第二正极耳(32)和第二负极耳(33)，所述第一正极耳(22)与所述第二正极耳(32)电连接，所述第一负极耳(23)和所述第二负极耳(33)电连接。
  9. 根据权利要求1至8任一项所述的电池单体，其中，所述第一电芯(2)的长度方向与所述第一方向(x)平行，所述第二电芯(3)的长度方向与所述第一方向(x)平行。
  10. 根据权利要求1至9任一项所述的电池单体，其中，所述第一电芯(2)包括自所述第一主体部(21)的与所述第一侧面(S1)相对的第三侧面(S3)引出的第三极耳(24)，所述第二电芯(3)包括自所述第二主体部(31)的与所述第二侧面(S2)相对的第四侧面(S4)引出的第四极耳(34)，所述第三极耳(24)与所述第四极耳(34)的极性相反。
  11. 根据权利要求10所述的电池单体，还包括第一极柱(61)和第二极柱(71)，所述第一极柱(61)与所述第三极耳(24)电连接，所述第二极柱(71)与所述第四极耳(34)电连接。
  12. 根据权利要求11所述的电池单体，还包括第一盖板(4)和第二盖板(5)，所述壳体(1)设有沿所述第一方向(x)相对设置的第一开口(11)和第二开口(12)，所述第一盖板(4)和所述第二盖板(5)分别封闭于所述第一开口(11)和所述第二开口(12)，所述第一极柱(61)设置于所述第一盖板(4)上，所述第二极柱(71)设置于所述第二盖板(5)上。
  13. 根据权利要求10至12任一项所述的电池单体，其中，
    所述第一主体部(21)包括第一正极片、第一负极片和第一隔膜，所述第一正极片和所述第一负极片卷绕或层叠形成所述第一主体部(21)，所述第一隔膜设置于所述第一正极片和所述第一负极片之间，所述第一正极片的第一端自所述第一主体部(21)的第三侧面(S3)延伸出来形成所述第三极耳(24)，所述第一负极片的第一端与所述第一主体部(21)的第三侧面(S3)齐平；或者，所述第一负极片的第一端自所述第一主体部(21)的第三侧面(S3)延伸出来形成所述第三极耳(24)，所述第一正极片的第一端与所述第一主体部(21)的第三侧面(S3)齐平；和/或，
    所述第二主体部(31)包括第二正极片、第二负极片和第二隔膜，所述第二正极片和所述第二负极片卷绕或层叠形成所述第二主体部(31)，所述第二隔膜设置于所述第 二正极片和所述第二负极片之间，所述第二正极片的第一端自所述第二主体部(31)的第四侧面(S4)延伸出来形成所述第四极耳(34)，所述第二负极片的第一端与所述第二主体部(31)的第四侧面(S4)齐平；或者，所述第二负极片的第一端自所述第二主体部(31)的第四侧面(S4)延伸出来形成所述第四极耳(34)，所述第二正极片的第一端与所述第二主体部(31)的第四侧面(S4)齐平。
  14. 根据权利要求1至9任一项所述的电池单体，其中，所述第一电芯(2)包括自所述第一主体部(21)的与所述第一侧面(S1)相对的第三侧面(S3)引出的第三正极耳(25)和第三负极耳(26)，所述第二电芯(3)包括自所述第二主体部(31)的与所述第二侧面(S2)相对的第四侧面(S4)引出的第四正极耳(35)和第四负极耳(36)。
  15. 根据权利要求14所述的电池单体，还包括第一极柱(61)、第二极柱(71)、第三极柱(62)和第四极柱(72)，所述第一极柱(61)与所述第三正极耳(25)电连接，所述第三极柱(62)与所述第三负极耳(26)电连接，所述第二极柱(71)与所述第四正极耳(35)电连接，所述第四极柱(72)与所述第四负极耳(36)电连接。
  16. 根据权利要求15所述的电池单体，还包括第一盖板(4)和第二盖板(5)，所述壳体(1)设有沿所述第一方向(x)相对设置的第一开口(11)和第二开口(12)，所述第一盖板(4)和所述第二盖板(5)分别封闭于所述第一开口(11)和所述第二开口(12)，所述第一极柱(61)和所述第三极柱(62)均设置于所述第一盖板(4)上，所述第二极柱(71)和所述第四极柱(72)均设置于所述第二盖板(5)上。
  17. 一种电池，包括如权利要求1至16任一项所述的电池单体。
  18. 一种用电设备，包括如权利要求1至16任一项所述的电池单体和/或权利要求17所述的电池，用于向所述用电设备供应电能。
PCT/CN2022/143219 2022-02-25 2022-12-29 电池单体、电池以及用电设备 WO2023160232A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112952240A (zh) * 2019-11-22 2021-06-11 比亚迪股份有限公司 一种电池、电池模组、电池包及汽车
CN113169401A (zh) * 2020-03-02 2021-07-23 东莞新能安科技有限公司 电池、电池模组、电池包、电动车、储能装置和电动工具
CN113328194A (zh) * 2020-02-13 2021-08-31 比亚迪股份有限公司 一种电池、电池模组、电池包以及电动车
CN214898768U (zh) * 2021-02-25 2021-11-26 恒大新能源技术(深圳)有限公司 电池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112952240A (zh) * 2019-11-22 2021-06-11 比亚迪股份有限公司 一种电池、电池模组、电池包及汽车
CN113328194A (zh) * 2020-02-13 2021-08-31 比亚迪股份有限公司 一种电池、电池模组、电池包以及电动车
CN113169401A (zh) * 2020-03-02 2021-07-23 东莞新能安科技有限公司 电池、电池模组、电池包、电动车、储能装置和电动工具
CN214898768U (zh) * 2021-02-25 2021-11-26 恒大新能源技术(深圳)有限公司 电池

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